Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.83 Safari/537.36
Chrome 85
Mac OS X 10.14.6
Desktop
4 years ago
Test name Executions per second
undefined 3249510.2 Ops/sec
typeof 9379625.0 Ops/sec
in 9336137.0 Ops/sec
hasOwnProperty 8548234.0 Ops/sec
bool 9362750.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool